Why is netball a girl sport?

Netball is considered a girls sport because of the no contact rule which makes it a girly woosy sport

But...

I'm a boy of fourteen and I play netball because I was finding Basketball too hard, and believe me, the girls I play against are not woosy! It may be no contact, but they're faster than me and they can jump and throw better. They tease me out of my wits during the game and I get so hot and bothered!